250 ANATOMICAL TECHNOLOGY. 



M. LEVATOR ANGULI SCAPULA. 



§ 666. Synonymy. — The human levator anguli scapulm. Q., A, 376, Q., A, I, 193 ; 

 "grand dentde" [the cervical portion], S.-B., A, II, 335; angulaire de I'omoplat,, Ch., A, 

 302 ; angidar muscle of the scapula Ch. (Fl.), A, 189 ; levator anguli scapulae, Miv., B, 145. 



Figures. — Ectal aspect (73) ; scapular end (75) ; insertion area (43). 



Posture and Exposure. — These are the same as with the serra- 

 tus magnus, excepting that the block may be under the neck, and 

 the muscles {scaleni) covering the series of ventral tubercles of the 

 diapophyses of the cervical vertebrae (Pig. 53) must be removed. 



General Description. — Thick, trapezoidal, just cephalad of the 

 M. serraius magnus, from the diapophyses of the 3d^7th cervical 

 mrtebrcB to the subscapular surface of the scapula close to the 

 vertebral border. 



Dissection. — After the division of the serratus magnus, this 

 forms the only union between the arm and the trunk. Note its 

 compactness as compared with the muscle just named, although 

 sometimes the vertebral end shows signs of subdivision. Transect 

 it at the middle. 



§ 667. Origin. — By fleshy fibers from the rounded ends of the 

 dorsal tubercles of the transverse processes of all the cervical verte- 

 brae excepting the atlas and axis, and from the ligaments between 

 the tubercles. Entad of the attachment will be seen the shining 

 tendons of the M. plagio-antobliquus cervicalis. The line of 

 origin is about 6 cm. long. 



Insertion. — The scapular attachment is by fleshy fibers upon a 

 triangular area about 15 mm. long by 5-10 mm. wide (Fig. 43). This 

 area is continuous with the area of insertion of the serratus mag- 

 nus, but the apex points in the opposite direction, that is, toward 

 the coracoid border of the scapula. The ental surface sometimes 

 receives the insertion of the occipito-scapularis (§ 617). 



Remark. — The arm, with the scapula attached, has now been separated from the trunk, 

 and may be dissected on a smaller tray. After reviewing the insertions of the muscles so 

 far examined, the dissector may remove them to within 1-3 cm. of their attachment. 



M. CORACOIDBUS. 



§ 668. Synonymy.— The human coraco-brachialis, G., A, 407, Q., A, I, 804 ; " cornco 

 hracMal," S.-D., A, II, 343 ; " corac.o-'brachial," Ch., A, 268 ; cwaco-hiimeralis Ch. (Fl.), A, 

 354; coraco-hrachialis, Miv., B, 148. 



Figures.— Cto^jMiS Irevc (73) ; caput longvm (75) ; insertion areas (70, 71). 



